To put at a loss as to what to think, say, or do; bewilder.(verb-transitive)
A state of perplexity, confusion, or bewilderment.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "nonplus" in a sentence
"Admiration which is the soul's "nonplus," its doing it knows not what, the winding of it up until it stands still, ready to break -- is all that we can arrive unto in the consideration hereof."
"Providence itself to a kind of nonplus, to attemper any dispensation of it to an universal acceptance; any more than that glorious fountain of light, the sun, can shine upon all the corners of the earth at once."
"The Insurance Companies are scum, and maybe private citizens can form competitive nonplus one profits to compete with them."